1987.5  0.475
1989.8  24.240
1990.2  39.264
1990.5  45.259
1991.4  -28.429
1992.6  29.772
1992.7  40.823
1993.3  -56.980
1993.5  -19.744
1993.6  -41.922
1994.6  0.185
1994.7  29.379
1995.4  -56.353
1995.4  -35.216
1995.9  -36.313
1996.3  -15.225
1996.5  -6.195
1996.6  3.862
1997.2  35.974
1997.3  -1.304
1997.3  -29.512
1997.3  -53.690